Rephrased, in a game that depends on proprietary centralized servers, what do I gain by having a public ledger that the game can query to say I own some asset? Or, alternatively, in a game that recognizes arbitrary decentralized permissions, what do I gain by having proprietary centralized servers? Let's avoid flowery language and deal with reality:
Scenario 1) I buy a sword from Joe on OpenSea. Epic games recognizes NFTs as a generic spec and lets me import it and use in the game. That's wonderful, but in this case I do not need to buy anything from Joe, I can just mint my own sword for free, since they'll recognize any spec-compliant contract.
Scenario 2) I buy a sword from Epic on OpenSea. Epic games only recognizes NFTs that they have the authority to mint. Yay. But now why didn't I just buy it from Epic directly, since I already depend on them fully for auth (they can just migrate the nft contract at will), what does having it on Ethereum add?
Scenario 3) Just like Scenario 2, but Epic recognizes a list of official partners that they trust but do not own. Meh. it's not that interesting. Might be a little more interesting if those partners are themselves DAO-controlled. Still, I think it's more in the category of "kinda neat" instead of "gamechanging"
Scenario 4) I earn a "high score" NFT by playing an Epic game, and they mint an NFT for me (I've gone through their login _and_ associated my wallet with their account). Other games recognize this specific NFT address as being owned by Epic and give special utility. Again, this is pointless, we've already placed all our trust in Epic's closed system, they might as well just expose an endpoint
Fully on-chain ecosystems with no leaks are a different beast imho. Decentralization is cool! It's just extremely crappy for game ux right now. I expect the tech here to catch up eventually. When it does, we can have:
Scenario 5) Doesn't exist now - but I play an on-chain game and earn some NFT. This is then recognized in another on-chain game that gives added functionality. Everything is governed by DAO. Interop can be voted in
This is cool. However, what's innovative about this is that it's basically open-source collaborative business. I do think that's pretty huge, in theory, if it took off. The hard part would be the actual programming and game design to make the interop interesting. The NFT part is still just an auth token, nothing more.